static ssize_t
jz_read(struct file * filp, char * buffer, size_t count, loff_t * ppos)
{
DECLARE_WAITQUEUE(wait, current);
struct jz_ts_t* ts = (struct jz_ts_t*)filp->private_data;
char *ptr = buffer;
struct ts_event event;
int err = 0;
dbg("jz_read");
add_wait_queue(&ts->wait, &wait);
while (count >= sizeof(struct ts_event)) {
err = -ERESTARTSYS;
if (signal_pending(current))
break;
if (event_pull(ts, &event)) {
err = copy_to_user(ptr, &event,
sizeof(struct ts_event));
if (err)
break;
ptr += sizeof(struct ts_event);
count -= sizeof(struct ts_event);
} else {
set_current_state(TASK_INTERRUPTIBLE);
err = -EAGAIN;
if (filp->f_flags & O_NONBLOCK)
break;
schedule();
}
}
current->state = TASK_RUNNING;
remove_wait_queue(&ts->wait, &wait);
return ptr == buffer ? err : ptr - buffer;
}
static ssize_t
xts_read(struct file *filp, char *buffer, size_t count, loff_t * ppos)
{
DECLARE_WAITQUEUE(wait, current);
struct xts_dev *dev = filp->private_data;
char *ptr = buffer;
int err = 0;
add_wait_queue(&dev->read_wait, &wait);
while (count >= sizeof (struct ts_event)) {
err = -ERESTARTSYS;
if (signal_pending(current))
break;
if (event_pending(dev)) {
struct ts_event *evt = event_get(dev);
err = copy_to_user(ptr, evt, sizeof (struct ts_event));
event_pull(dev);
if (err)
break;
ptr += sizeof (struct ts_event);
count -= sizeof (struct ts_event);
continue;
}
set_current_state(TASK_INTERRUPTIBLE);
err = -EAGAIN;
if (filp->f_flags & O_NONBLOCK)
break;
schedule();
}
current->state = TASK_RUNNING;
remove_wait_queue(&dev->read_wait, &wait);
return ptr == buffer ? err : ptr - buffer;
}
static int l_pull (lua_State *L) {
lua_pushnumber(L, event_pull(lua_tonumber(L, 1)));
return 1;
}
